question_answer

A thin prism of glass is placed in air and water successively. If \[{}_{\alpha }{{\mu }_{g}}=3/2\] and \[{}_{\alpha }{{\mu }_{W}}=4/3,\] then the ratio of deviation produced by the prism for a small angle of incidence when placed in air and water is

A) 9 : 8     

B) 4 : 3

C) 3 : 4     

D) 4 : 1